Complete all quests & get 9 graves for Homer - you win a prize after the Sunday episode????????

I'm a bit confused. I just got the first grave but the quest started yesterday. This thread seems to say the quest needed to be done by Sunday, but mine hadn't even started by then! Now I can't visit friends' Springfields because I need an update, apparently. I don't know how to get it. I've turned the app off and back on again a few times, even switched devices. I'm confused. I'm going to do the quest line if they keep appearing, right now homer is stuffing his face some more.
This is really weird.